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Määttä Antti ebae7fc426 Fix reset with qoffscreensurface destruction with multimonitor support
The qoffscreensurface::setScreen crashes in create if application is
closing. This happens in multimonitor setup when one of the screens is
already destroyed and qoffscreensurface handles the screenDestroyed
signal. In this case the QGuiApplication::primaryScreen returns non-null
surface and selects the codepath that recreates the surface. The create
function calls the qGuiApp->thread function, which crashes since the
application instance has already been set to nullptr. Prevent this in
qoffscreensurface by checking the application instance in the setScreen
function.

Task-number: QTBUG-62222
Change-Id: Ibb11a270c23a39e66009b45ab83dd7d47d5ccb1f
Reviewed-by: Janne Koskinen <janne.p.koskinen@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
2017-08-08 07:57:31 +00:00
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